Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-2777

Privilege escalation in the Messaging System component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 19.9%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2026-2777


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